DETERMINENTS V1.2

size: 713 bytes

for TI-83/TI-83 Plus BASIC

this is better than determinants v1.00 because v1.00 made you convert the answers to fractions yourself but v1.11 shows you both decimal and fraction for answers

uses variables: a,b,c,d,e,f,g,r,w,h,i,j,k,l,m,n,o,p,s,t,x,y. I didnt have to use all these but I did anyway so go ahead and optimize this program if you want as long as you give me some credit.

This program calculates, given the proper equations, the second or third order determinents according to Cramer's Rule. 

ex: if you have an equation like:

    2x+3y=5
   -3x+6y=7

   in the program goto the 2nd order button
   the program should then prompt you for A1, A2, B1, B2, C1, and C2. For A1 type in 2, for A2 type in -3, for  B1 type in 3, for B2 type in 6, for C1 type in 5, for C2 type in 7. I hope you get the point. once you have entered the values, the value for x and y will be shown as long as the determinant.

ex: if you have an equation like:

    3x+2y-z=5
    4x+y-2z=8
      -3y+z=9

    in the program goto the 3rd order button (because this is a third order equation; you need very little experience with determinants to tell). For A1 type 3, for A2 type 4, for A3 type 0 (because there is no x), for B1 type 2, for B2 type 1, for B3 type -3, for C1 type -1, for C2 type -2, for C3 type 1, for D1 type 5, for D2 type 8, for D3 type 9. Values for x, y, and z will then be displayed along with the determinant.


I hope you find this program useful as it could save you  pages of work and is a great way to check your work.


In a later version I hope to add fourth or more order determinants ( I might have to expand by minors but haven't even tried making a code for that since I've only had my ti-83 plus for a few months and I am fairly new to programming).
    

I am a sophomore in high school and I am in Algebra 2H.
If you have any questions about this program, email me at monoman2@ca.freei.net

 email me and I'll try to answer your questions. Thankyou for downloading this program.

changes:

v1.2: program is around 100 bytes bigger but actually save around 400 bytes of RAM than previous version.